body, html {
  margin: 0;
  padding: 0;
}
ul {
  list-style: none;
}
input, select {
  border: none;
  outline: none;
}

.vertical {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}
.middle {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}
.center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}